<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<!-- 
	Copyright (C) 2007, 2008, 2009, 2010, 2011. PARP Research Group.
	<http://perception.inf.um.es>
	University of Murcia, Spain.

	This file is part of the QVision library.

	QVision is free software: you can redistribute it and/or modify
	it under the terms of the GNU Lesser General Public License as
	published by the Free Software Foundation, version 3 of the License.

	QVision is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public
	License along with QVision. If not, see <http://www.gnu.org/licenses/>.
-->

<html><head><meta http-equiv="content-Type" content="text/html;charset=UTF-8">
<title>QVision: Qt&#39;s Image, Video and Computer Vision Library</title>
<meta name="title" content="QVision" />
<meta name="dc.title" content="QVision" />
<meta name="url" content="http://perception.inf.um.es/QVision" />
<meta name="author" content="PARP Research Group - http://perception.inf.um.es" />
<meta name="revisit-after" content="30 DAYS"/>
<meta name="robots" content="index,follow"/>
<meta name="classification" content="*">
<meta name="rating" content="Safe For Kids">
<meta name="distribution" content="GLOBAL"/>
<meta name="description" content="Qt's Image, Video and Computer Vision Library"/>
<meta name="page-topic" content="Computer Vision research and prototype programming"/>
<meta name="geo.country" content="ES" />

<!--
Keywords:
By license:		open source, gnu, lgpl, gpl, free
By theme:		computer vision, image processing, robotics, programming, source, development
By usage:		library, toolkit, framework, prototype, application
By programming specs:	object oriented, c++, block programming, reusability, gui, graphical, parallel computing, high performance, GPU, prototyping
Interoperability with:	Qt, GSL, GNU Scientific library, OpenCV, CGAL, QWT, CUDA, mplayer, IPP, Intel Image Performance Primitives, blas, lapack
Functionallity:		image features, matrix algebra, projective geometry, mser, function minimization, function optimization, canny operator, harris operator, corner detection, performance evaluation, cpu usage, graphical interface
Main data-types:	matrix, vector, tensor, quaternion, image, polyline
Video sources:		webcam, camera, stream
Devices:		embedded, desktop computer, laptop, mini-laptop
Authors:		PARP research group. University of Murcia, Spain.
-->

<meta name="keywords" content="augmented reality, sfm, structure from motion, open source, gnu, lgpl, gpl, free, computer vision, image processing, robotics, programming, source, development, library, toolkit, framework, prototype, application, object oriented, c++, block programming, reusability, gui, graphical, parallel computing, high performance, GPU, prototyping, Qt, GSL, GNU Scientific library, OpenCV, CGAL, QWT, CUDA, mplayer, IPP, Intel Image Performance Primitives, blas, lapack, image features, matrix algebra, projective geometry, mser, function minimization, function optimization, canny operator, harris operator, corner detection, performance evaluation, cpu usage, graphical interface, matrix, vector, tensor, quaternion, image, polyline, webcam, camera, stream, embedded, desktop computer, laptop, mini-laptop, University of Murcia, Spain, PARP research group, vision por computador"/>
<meta http-equiv="keywords" content="augmented reality, sfm, structure from motion, open source, gnu, lgpl, gpl, free, computer vision, image processing, robotics, programming, source, development, library, toolkit, framework, prototype, application, object oriented, c++, block programming, reusability, gui, graphical, parallel computing, high performance, GPU, prototyping, Qt, GSL, GNU Scientific library, OpenCV, CGAL, QWT, CUDA, mplayer, IPP, Intel Image Performance Primitives, blas, lapack, image features, matrix algebra, projective geometry, mser, function minimization, function optimization, canny operator, harris operator, corner detection, performance evaluation, cpu usage, graphical interface, matrix, vector, tensor, quaternion, image, polyline, webcam, camera, stream, embedded, desktop computer, laptop, mini-laptop, University of Murcia, Spain, PARP research group, vision por computador"/>
<meta http-equiv="pragma" content="no-cache"/>
<meta http-equiv="title" content="QVision"/>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
<link href="tabs.css" rel="stylesheet" type="text/css" />
<link rel="shortcut icon" href="favicon.ico" />
</head><body>

<table width="100%"><tr>
	<td><a href="http://perception.inf.um.es/"><img src="parp.png" border="0" /> <big>PARP Research Group</big></a></td>
	<td align="right"><a href="http://www.um.es/"><big>Universidad de Murcia</big> <img src="um.png" border="0" /></a></td>
</tr></table>

<hr /><br />

<table width="95%" align="center"><tr><td>

<!-- Generated by Doxygen 1.6.3 -->
<script type="text/javascript"><!--
var searchBox = new SearchBox("searchBox", "search",false,'Search');
--></script>
<div class="navigation" id="top">
  <div class="tabs">
    <ul>
      <li><a href="index.html"><span>Main&nbsp;Page</span></a></li>
      <li><a href="pages.html"><span>Related&nbsp;Pages</span></a></li>
      <li><a href="modules.html"><span>Modules</span></a></li>
      <li><a href="annotated.html"><span>Classes</span></a></li>
      <li class="current"><a href="files.html"><span>Files</span></a></li>
      <li>
        <div id="MSearchBox" class="MSearchBoxInactive">
          <form id="FSearchBox" action="search.php" method="get">
            <img id="MSearchSelect" src="search/search.png" alt=""/>
            <input type="text" id="MSearchField" name="query" value="Search" size="20" accesskey="S" 
                   onfocus="searchBox.OnSearchFieldFocus(true)" 
                   onblur="searchBox.OnSearchFieldFocus(false)"/>
          </form>
        </div>
      </li>
    </ul>
  </div>
  <div class="tabs">
    <ul>
      <li><a href="files.html"><span>File&nbsp;List</span></a></li>
      <li><a href="globals.html"><span>File&nbsp;Members</span></a></li>
    </ul>
  </div>
<h1>src/qvblockprogramming/qvguiblocks/qvvideoreaderblockwidget.cpp</h1><a href="qvvideoreaderblockwidget_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> *      Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012. PARP Research Group.</span>
<a name="l00003"></a>00003 <span class="comment"> *      &lt;http://perception.inf.um.es&gt;</span>
<a name="l00004"></a>00004 <span class="comment"> *      University of Murcia, Spain.</span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> *      This file is part of the QVision library.</span>
<a name="l00007"></a>00007 <span class="comment"> *</span>
<a name="l00008"></a>00008 <span class="comment"> *      QVision is free software: you can redistribute it and/or modify</span>
<a name="l00009"></a>00009 <span class="comment"> *      it under the terms of the GNU Lesser General Public License as</span>
<a name="l00010"></a>00010 <span class="comment"> *      published by the Free Software Foundation, version 3 of the License.</span>
<a name="l00011"></a>00011 <span class="comment"> *</span>
<a name="l00012"></a>00012 <span class="comment"> *      QVision is distributed in the hope that it will be useful,</span>
<a name="l00013"></a>00013 <span class="comment"> *      but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00014"></a>00014 <span class="comment"> *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span>
<a name="l00015"></a>00015 <span class="comment"> *      GNU Lesser General Public License for more details.</span>
<a name="l00016"></a>00016 <span class="comment"> *</span>
<a name="l00017"></a>00017 <span class="comment"> *      You should have received a copy of the GNU Lesser General Public</span>
<a name="l00018"></a>00018 <span class="comment"> *      License along with QVision. If not, see &lt;http://www.gnu.org/licenses/&gt;.</span>
<a name="l00019"></a>00019 <span class="comment"> */</span>
<a name="l00020"></a>00020 
<a name="l00024"></a>00024 
<a name="l00025"></a>00025 <span class="preprocessor">#include &quot;<a class="code" href="qvvideoreaderblockwidget_8h.html" title="File from the QVision library.">qvvideoreaderblockwidget.h</a>&quot;</span>
<a name="l00026"></a>00026 <span class="preprocessor">#include &lt;QFileDialog&gt;</span>
<a name="l00027"></a>00027 
<a name="l00028"></a>00028 QVVideoReaderBlockWidget::QVVideoReaderBlockWidget(<a class="code" href="classQVVideoReaderBlock.html" title="This is a generic video input processing block for the QVision architecture.">QVVideoReaderBlock</a> *cam, QWidget *parent): QWidget(parent), <a class="code" href="classQVPropertyContainer.html" title="Base class for dynamic property container objects.">QVPropertyContainer</a>(<span class="stringliteral">&quot;&quot;</span>)
<a name="l00029"></a>00029     {
<a name="l00030"></a>00030     slider_active = <span class="keyword">true</span>;
<a name="l00031"></a>00031     form.setupUi(<span class="keyword">this</span>);
<a name="l00032"></a>00032     this-&gt;camera = cam;
<a name="l00033"></a>00033 
<a name="l00034"></a>00034     <span class="comment">// Set prop. container name:</span>
<a name="l00035"></a>00035     setName(QString(<span class="stringliteral">&quot;GUI for camera &quot;</span>)+cam-&gt;<a class="code" href="classQVPropertyContainer.html#a82e880a6c160f3780bc8f7b822fbbd85" title="Retrieves identifier QString of the object.">getName</a>());
<a name="l00036"></a>00036 
<a name="l00037"></a>00037     <span class="comment">// First, we initialize our properties by looking at the initial properties of the camera.</span>
<a name="l00038"></a>00038     <span class="comment">// Danger: Here we must read directly from camera properties, in order to initialize correctly the values of the</span>
<a name="l00039"></a>00039     <span class="comment">// widget. We need to do it this way to avoid the need of making them also output properties in the camera</span>
<a name="l00040"></a>00040     <span class="comment">// In any case, here it is still safe to do this, because the camera block is still not running. It is a similar</span>
<a name="l00041"></a>00041     <span class="comment">// case to that of a qvparaminspectorwidget.</span>
<a name="l00042"></a>00042     <span class="keywordtype">int</span> cols = camera-&gt;<a class="code" href="classQVPropertyContainer.html#affc6008202b566e68ab20cec8b16a7ee" title="Method to get the actual value of a property.">getPropertyValue</a>&lt;<span class="keywordtype">int</span>&gt;(<span class="stringliteral">&quot;Cols&quot;</span>), rows = camera-&gt;getPropertyValue&lt;<span class="keywordtype">int</span>&gt;(<span class="stringliteral">&quot;Rows&quot;</span>);
<a name="l00043"></a>00043     QString url = camera-&gt;getPropertyValue&lt;QString&gt;(<span class="stringliteral">&quot;URL&quot;</span>);
<a name="l00044"></a>00044     <span class="keywordtype">bool</span> noloop = camera-&gt;getPropertyValue&lt;<span class="keywordtype">bool</span>&gt;(<span class="stringliteral">&quot;NoLoop&quot;</span>), deinterlaced = camera-&gt;getPropertyValue&lt;<span class="keywordtype">bool</span>&gt;(<span class="stringliteral">&quot;Deinterlaced&quot;</span>);
<a name="l00045"></a>00045     <span class="keywordtype">bool</span> realTime = camera-&gt;getPropertyValue&lt;<span class="keywordtype">bool</span>&gt;(<span class="stringliteral">&quot;RealTime&quot;</span>);
<a name="l00046"></a>00046 
<a name="l00047"></a>00047     setPropertyValue&lt;int&gt;(<span class="stringliteral">&quot;Cols&quot;</span>,cols);
<a name="l00048"></a>00048     setPropertyValue&lt;int&gt;(<span class="stringliteral">&quot;Rows&quot;</span>,rows);
<a name="l00049"></a>00049     setPropertyValue&lt;QString&gt;(<span class="stringliteral">&quot;URL&quot;</span>,url);
<a name="l00050"></a>00050     setPropertyValue&lt;bool&gt;(<span class="stringliteral">&quot;NoLoop&quot;</span>,noloop);
<a name="l00051"></a>00051     setPropertyValue&lt;bool&gt;(<span class="stringliteral">&quot;Deinterlaced&quot;</span>,deinterlaced);
<a name="l00052"></a>00052 
<a name="l00053"></a>00053     form.spinbox_cols-&gt;setValue(cols);
<a name="l00054"></a>00054     form.spinbox_rows-&gt;setValue(rows);
<a name="l00055"></a>00055     form.url_line_edit-&gt;setText(url);
<a name="l00056"></a>00056     form.noloop_button-&gt;setChecked(noloop);
<a name="l00057"></a>00057     form.deinterlaced_button-&gt;setChecked(deinterlaced);
<a name="l00058"></a>00058     form.real_time_label-&gt;setText(realTime?<span class="stringliteral">&quot;Real Time&quot;</span>:<span class="stringliteral">&quot;Max speed&quot;</span>);
<a name="l00059"></a>00059 
<a name="l00060"></a>00060     <span class="comment">// Subscribe (asynchronously) to all relevant input properties of the camera:</span>
<a name="l00061"></a>00061     subscribeToInputProperty(cam,<span class="stringliteral">&quot;NoLoop&quot;</span>);
<a name="l00062"></a>00062     subscribeToInputProperty(cam,<span class="stringliteral">&quot;Deinterlaced&quot;</span>);
<a name="l00063"></a>00063     subscribeToInputProperty(cam,<span class="stringliteral">&quot;URL&quot;</span>);
<a name="l00064"></a>00064     subscribeToInputProperty(cam,<span class="stringliteral">&quot;Cols&quot;</span>);
<a name="l00065"></a>00065     subscribeToInputProperty(cam,<span class="stringliteral">&quot;Rows&quot;</span>);
<a name="l00066"></a>00066 
<a name="l00067"></a>00067     subscribeToOutputProperty(cam,<span class="stringliteral">&quot;Opened&quot;</span>);
<a name="l00068"></a>00068     subscribeToOutputProperty(cam,<span class="stringliteral">&quot;FPS&quot;</span>);
<a name="l00069"></a>00069     subscribeToOutputProperty(cam,<span class="stringliteral">&quot;Frames&quot;</span>);
<a name="l00070"></a>00070     subscribeToOutputProperty(cam,<span class="stringliteral">&quot;ColsR&quot;</span>);
<a name="l00071"></a>00071     subscribeToOutputProperty(cam,<span class="stringliteral">&quot;RowsR&quot;</span>);
<a name="l00072"></a>00072     subscribeToOutputProperty(cam,<span class="stringliteral">&quot;Pos&quot;</span>);
<a name="l00073"></a>00073     subscribeToOutputProperty(cam,<span class="stringliteral">&quot;Length&quot;</span>);
<a name="l00074"></a>00074 
<a name="l00075"></a>00075     connect(cam,SIGNAL(opened()),<span class="keyword">this</span>,SLOT(updateOpened())<span class="comment">/*,Qt::BlockingQueuedConnection*/</span>);
<a name="l00076"></a>00076     connect(cam,SIGNAL(closed()),<span class="keyword">this</span>,SLOT(updateClosed())<span class="comment">/*,Qt::BlockingQueuedConnection*/</span>);
<a name="l00077"></a>00077     <span class="keywordflow">if</span>(realTime)
<a name="l00078"></a>00078         connect(cam,SIGNAL(grabbed()),<span class="keyword">this</span>,SLOT(newFrameGrabbed()));
<a name="l00079"></a>00079     <span class="keywordflow">else</span>
<a name="l00080"></a>00080         connect(cam,SIGNAL(endIteration(uint,<span class="keywordtype">int</span>)),<span class="keyword">this</span>,SLOT(newFrameGrabbed()));
<a name="l00081"></a>00081 
<a name="l00082"></a>00082     connect(form.stop_button,SIGNAL(pressed()),<span class="keyword">this</span>,SLOT(stopPressed()));
<a name="l00083"></a>00083 
<a name="l00084"></a>00084     connect(form.pause_button,SIGNAL(pressed()),cam,SLOT(pause()));
<a name="l00085"></a>00085     connect(form.pause_button,SIGNAL(pressed()),<span class="keyword">this</span>,SLOT(pausePressed()));
<a name="l00086"></a>00086 
<a name="l00087"></a>00087     connect(form.play_button,SIGNAL(pressed()),cam,SLOT(unPause()));
<a name="l00088"></a>00088     connect(form.play_button,SIGNAL(pressed()),<span class="keyword">this</span>,SLOT(playPressed()));
<a name="l00089"></a>00089 
<a name="l00090"></a>00090     connect(form.next_button,SIGNAL(pressed()),cam,SLOT(step()));
<a name="l00091"></a>00091     connect(form.next_button,SIGNAL(pressed()),<span class="keyword">this</span>,SLOT(nextPressed()));
<a name="l00092"></a>00092 
<a name="l00093"></a>00093     connect(form.seek_slider,SIGNAL(sliderPressed()),<span class="keyword">this</span>,SLOT(seekPressed()));
<a name="l00094"></a>00094     connect(form.seek_slider,SIGNAL(sliderReleased()),<span class="keyword">this</span>,SLOT(seekReleased()));
<a name="l00095"></a>00095 
<a name="l00096"></a>00096     connect(<span class="keyword">this</span>,SIGNAL(seek_requested(<span class="keywordtype">int</span>)),camera,SLOT(setPos(<span class="keywordtype">int</span>)));
<a name="l00097"></a>00097 
<a name="l00098"></a>00098     connect(form.url_line_edit,SIGNAL(editingFinished()),<span class="keyword">this</span>,SLOT(somePropertyChanged()));
<a name="l00099"></a>00099     connect(form.spinbox_cols,SIGNAL(valueChanged(<span class="keywordtype">int</span>)),<span class="keyword">this</span>,SLOT(somePropertyChanged()));
<a name="l00100"></a>00100     connect(form.spinbox_rows,SIGNAL(valueChanged(<span class="keywordtype">int</span>)),<span class="keyword">this</span>,SLOT(somePropertyChanged()));
<a name="l00101"></a>00101     connect(form.noloop_button,SIGNAL(toggled(<span class="keywordtype">bool</span>)),<span class="keyword">this</span>,SLOT(somePropertyChanged()));
<a name="l00102"></a>00102     connect(form.deinterlaced_button,SIGNAL(toggled(<span class="keywordtype">bool</span>)),<span class="keyword">this</span>,SLOT(somePropertyChanged()));
<a name="l00103"></a>00103 
<a name="l00104"></a>00104     connect(form.file_open_button,SIGNAL(pressed()),<span class="keyword">this</span>,SLOT(fileOpenButtonPressed()));
<a name="l00105"></a>00105     connect(<span class="keyword">this</span>,SIGNAL(file_selected()),cam,SLOT(reopen()));
<a name="l00106"></a>00106 
<a name="l00107"></a>00107     connect(form.reopen_button,SIGNAL(pressed()),cam,SLOT(reopen()));
<a name="l00108"></a>00108 
<a name="l00109"></a>00109     }
<a name="l00110"></a>00110 
<a name="l00111"></a>00111 <span class="keywordtype">void</span> QVVideoReaderBlockWidget::subscribeToOutputProperty(<a class="code" href="classQVPropertyContainer.html" title="Base class for dynamic property container objects.">QVPropertyContainer</a> *qvp, QString name, LinkType linktype)
<a name="l00112"></a>00112     {
<a name="l00113"></a>00113     <span class="comment">// Adds a property with the same name than that of another qvpropertycontainer, and links to it (from there to here)</span>
<a name="l00114"></a>00114     <span class="comment">// with the desired link type. Observe that the property is initialized with its current value in the qvp object:</span>
<a name="l00115"></a>00115     addPropertyFromQVariant(name, inputFlag, qvp-&gt;<a class="code" href="classQVPropertyContainer.html#a253156f365b20fa2e0accc82dff1284f" title="Method to get the value of a property as a QVariant.">getPropertyQVariantValue</a>(name),qvp-&gt;<a class="code" href="classQVPropertyContainer.html#afbbd3b9914406c1e237d9443ea5fa48b" title="Method to get the info QString for int typed property.">getPropertyInfo</a>(name));
<a name="l00116"></a>00116     qvp-&gt;<a class="code" href="classQVPropertyContainer.html#abd2a991c0bc91cee684ff3ffc80825dd" title="Links properties among QVPropertyContainer&amp;#39;s.">linkProperty</a>(name,<span class="keyword">this</span>,name,linktype);
<a name="l00117"></a>00117     }
<a name="l00118"></a>00118 
<a name="l00119"></a>00119 <span class="keywordtype">void</span> QVVideoReaderBlockWidget::subscribeToInputProperty(<a class="code" href="classQVPropertyContainer.html" title="Base class for dynamic property container objects.">QVPropertyContainer</a> *qvp, QString name, LinkType linktype)
<a name="l00120"></a>00120     {
<a name="l00121"></a>00121     <span class="comment">// Adds a property with the same name than that of another qvpropertycontainer, and links to it (from here to there)</span>
<a name="l00122"></a>00122     <span class="comment">// with the desired link type. Observe that the property is initialized with its current value in the qvp object:</span>
<a name="l00123"></a>00123     addPropertyFromQVariant(name, outputFlag, qvp-&gt;<a class="code" href="classQVPropertyContainer.html#a253156f365b20fa2e0accc82dff1284f" title="Method to get the value of a property as a QVariant.">getPropertyQVariantValue</a>(name),qvp-&gt;<a class="code" href="classQVPropertyContainer.html#afbbd3b9914406c1e237d9443ea5fa48b" title="Method to get the info QString for int typed property.">getPropertyInfo</a>(name));
<a name="l00124"></a>00124     this-&gt;linkProperty(name,qvp,name,linktype);
<a name="l00125"></a>00125     }
<a name="l00126"></a>00126 
<a name="l00127"></a>00127 <span class="keywordtype">void</span> QVVideoReaderBlockWidget::somePropertyChanged()
<a name="l00128"></a>00128     {
<a name="l00129"></a>00129     setPropertyValue&lt;QString&gt;(<span class="stringliteral">&quot;URL&quot;</span>,form.url_line_edit-&gt;text());
<a name="l00130"></a>00130     setPropertyValue&lt;int&gt;(<span class="stringliteral">&quot;Cols&quot;</span>,form.spinbox_cols-&gt;value());
<a name="l00131"></a>00131     setPropertyValue&lt;int&gt;(<span class="stringliteral">&quot;Rows&quot;</span>,form.spinbox_rows-&gt;value());
<a name="l00132"></a>00132     setPropertyValue&lt;bool&gt;(<span class="stringliteral">&quot;NoLoop&quot;</span>,form.noloop_button-&gt;isChecked());
<a name="l00133"></a>00133     setPropertyValue&lt;bool&gt;(<span class="stringliteral">&quot;Deinterlaced&quot;</span>,form.deinterlaced_button-&gt;isChecked());
<a name="l00134"></a>00134 
<a name="l00135"></a>00135     writeOutputProperties();
<a name="l00136"></a>00136     }
<a name="l00137"></a>00137 
<a name="l00138"></a>00138 <span class="keywordtype">void</span> QVVideoReaderBlockWidget::updateOpened()
<a name="l00139"></a>00139     {
<a name="l00140"></a>00140     form.stop_button-&gt;setEnabled(TRUE);
<a name="l00141"></a>00141     form.pause_button-&gt;setEnabled(TRUE);
<a name="l00142"></a>00142     form.play_button-&gt;setEnabled(FALSE);
<a name="l00143"></a>00143     form.next_button-&gt;setEnabled(FALSE);
<a name="l00144"></a>00144     }
<a name="l00145"></a>00145 
<a name="l00146"></a>00146 <span class="keywordtype">void</span> QVVideoReaderBlockWidget::updateClosed()
<a name="l00147"></a>00147     {
<a name="l00148"></a>00148     form.stop_button-&gt;setEnabled(FALSE);
<a name="l00149"></a>00149     form.pause_button-&gt;setEnabled(FALSE);
<a name="l00150"></a>00150     form.play_button-&gt;setEnabled(FALSE);
<a name="l00151"></a>00151     form.next_button-&gt;setEnabled(FALSE);
<a name="l00152"></a>00152     }
<a name="l00153"></a>00153 
<a name="l00154"></a>00154 <span class="keywordtype">void</span> QVVideoReaderBlockWidget::stopPressed()
<a name="l00155"></a>00155     {
<a name="l00156"></a>00156     form.stop_button-&gt;setEnabled(FALSE);
<a name="l00157"></a>00157     form.pause_button-&gt;setEnabled(FALSE);
<a name="l00158"></a>00158     form.play_button-&gt;setEnabled(FALSE);
<a name="l00159"></a>00159     form.next_button-&gt;setEnabled(FALSE);
<a name="l00160"></a>00160     }
<a name="l00161"></a>00161 
<a name="l00162"></a>00162 <span class="keywordtype">void</span> QVVideoReaderBlockWidget::pausePressed()
<a name="l00163"></a>00163     {
<a name="l00164"></a>00164     form.pause_button-&gt;setEnabled(FALSE);
<a name="l00165"></a>00165     form.play_button-&gt;setEnabled(TRUE);
<a name="l00166"></a>00166     form.next_button-&gt;setEnabled(TRUE);
<a name="l00167"></a>00167     }
<a name="l00168"></a>00168 
<a name="l00169"></a>00169 <span class="keywordtype">void</span> QVVideoReaderBlockWidget::playPressed()
<a name="l00170"></a>00170     {
<a name="l00171"></a>00171     form.pause_button-&gt;setEnabled(TRUE);
<a name="l00172"></a>00172     form.play_button-&gt;setEnabled(FALSE);
<a name="l00173"></a>00173     form.next_button-&gt;setEnabled(FALSE);
<a name="l00174"></a>00174     }
<a name="l00175"></a>00175 
<a name="l00176"></a>00176 <span class="keywordtype">void</span> QVVideoReaderBlockWidget::nextPressed()
<a name="l00177"></a>00177     {
<a name="l00178"></a>00178     }
<a name="l00179"></a>00179 
<a name="l00180"></a>00180 <span class="keywordtype">void</span> QVVideoReaderBlockWidget::newFrameGrabbed()
<a name="l00181"></a>00181     {
<a name="l00182"></a>00182     readInputProperties();
<a name="l00183"></a>00183 
<a name="l00184"></a>00184     form.frames_label-&gt;setText(QString(<span class="stringliteral">&quot;Frames: %1&quot;</span>).arg(getPropertyValue&lt;int&gt;(<span class="stringliteral">&quot;Frames&quot;</span>)));
<a name="l00185"></a>00185     form.size_label-&gt;setText(QString(<span class="stringliteral">&quot;Size: %1x%2&quot;</span>).arg(getPropertyValue&lt;int&gt;(<span class="stringliteral">&quot;ColsR&quot;</span>)).arg(getPropertyValue&lt;int&gt;(<span class="stringliteral">&quot;RowsR&quot;</span>)));
<a name="l00186"></a>00186     <span class="comment">//QString len_string = QString(&quot;%1&quot;).arg(getPropertyValue&lt;int&gt;(&quot;Length&quot;),1,&#39;f&#39;,1);</span>
<a name="l00187"></a>00187     <span class="comment">//QString pos_string = QString(&quot;%1&quot;).arg(getPropertyValue&lt;int&gt;(&quot;Pos&quot;),1,&#39;f&#39;,1);</span>
<a name="l00188"></a>00188     QString len_string = QString(<span class="stringliteral">&quot;%1&quot;</span>).arg(getPropertyValue&lt;int&gt;(<span class="stringliteral">&quot;Length&quot;</span>),1);
<a name="l00189"></a>00189     QString pos_string = QString(<span class="stringliteral">&quot;%1&quot;</span>).arg(getPropertyValue&lt;int&gt;(<span class="stringliteral">&quot;Pos&quot;</span>),1);
<a name="l00190"></a>00190     form.pos_label-&gt;setText(<span class="stringliteral">&quot;Position: &quot;</span> + pos_string + <span class="stringliteral">&quot;/&quot;</span> + len_string );
<a name="l00191"></a>00191     form.fps_label-&gt;setText(QString(<span class="stringliteral">&quot;FPS: %1&quot;</span>).arg(getPropertyValue&lt;int&gt;(<span class="stringliteral">&quot;FPS&quot;</span>)));
<a name="l00192"></a>00192 
<a name="l00193"></a>00193     <span class="keywordflow">if</span>(getPropertyValue&lt;int&gt;(<span class="stringliteral">&quot;Length&quot;</span>) &gt; 0)
<a name="l00194"></a>00194         {
<a name="l00195"></a>00195         form.seek_slider-&gt;setEnabled(TRUE);
<a name="l00196"></a>00196         <span class="keywordflow">if</span>(slider_active)
<a name="l00197"></a>00197             {
<a name="l00198"></a>00198             <span class="keywordtype">int</span> pos = (int)(form.seek_slider-&gt;maximum()*getPropertyValue&lt;int&gt;(<span class="stringliteral">&quot;Pos&quot;</span>)/getPropertyValue&lt;int&gt;(<span class="stringliteral">&quot;Length&quot;</span>));
<a name="l00199"></a>00199             form.seek_slider-&gt;setValue(pos);
<a name="l00200"></a>00200             }
<a name="l00201"></a>00201         }
<a name="l00202"></a>00202     }
<a name="l00203"></a>00203 
<a name="l00204"></a>00204 
<a name="l00205"></a>00205 <span class="keywordtype">void</span> QVVideoReaderBlockWidget::seekPressed()
<a name="l00206"></a>00206     {
<a name="l00207"></a>00207     slider_active = <span class="keyword">false</span>;
<a name="l00208"></a>00208     }
<a name="l00209"></a>00209 
<a name="l00210"></a>00210 <span class="keywordtype">void</span> QVVideoReaderBlockWidget::seekReleased()
<a name="l00211"></a>00211     {
<a name="l00212"></a>00212     slider_active = <span class="keyword">true</span>;
<a name="l00213"></a>00213     emit seek_requested(form.seek_slider-&gt;value()*getPropertyValue&lt;int&gt;(<span class="stringliteral">&quot;Length&quot;</span>)/form.seek_slider-&gt;maximum());
<a name="l00214"></a>00214     }
<a name="l00215"></a>00215 
<a name="l00216"></a>00216 <span class="keywordtype">void</span> QVVideoReaderBlockWidget::fileOpenButtonPressed()
<a name="l00217"></a>00217     {
<a name="l00218"></a>00218     QFileDialog dialog(<span class="keyword">this</span>);
<a name="l00219"></a>00219 
<a name="l00220"></a>00220     QStringList filters;
<a name="l00221"></a>00221 
<a name="l00222"></a>00222     <span class="comment">/*#ifdef QVIPP</span>
<a name="l00223"></a>00223 <span class="comment">    if((dynamic_cast&lt;QVYUV4MPEG2ReaderBlock*&gt;(camera)) != NULL)</span>
<a name="l00224"></a>00224 <span class="comment">        filters &lt;&lt; &quot;Video Files (*.yuv)&quot; &lt;&lt; &quot;All files (*)&quot;;</span>
<a name="l00225"></a>00225 <span class="comment">    #ifdef QVMPLAYER</span>
<a name="l00226"></a>00226 <span class="comment">    else if((dynamic_cast&lt;QVMPlayerReaderBlock*&gt;(camera)) != NULL)</span>
<a name="l00227"></a>00227 <span class="comment">        filters &lt;&lt; &quot;Video Files (*.avi *.dv *.mpg *.mpeg *.yuv *.wmv)&quot; &lt;&lt; &quot;All files (*)&quot;;</span>
<a name="l00228"></a>00228 <span class="comment">    #endif // QVMPLAYER</span>
<a name="l00229"></a>00229 <span class="comment">    else</span>
<a name="l00230"></a>00230 <span class="comment">        filters &lt;&lt; &quot;All files (*)&quot;;</span>
<a name="l00231"></a>00231 <span class="comment">    #else // QVIPP</span>
<a name="l00232"></a>00232 <span class="comment">        filters &lt;&lt; &quot;All files (*)&quot;;</span>
<a name="l00233"></a>00233 <span class="comment">    #endif // QVIPP*/</span>
<a name="l00234"></a>00234 
<a name="l00235"></a>00235     filters &lt;&lt; <span class="stringliteral">&quot;Video Files (*.avi *.dv *.mpg *.mpeg *.yuv *.wmv)&quot;</span> &lt;&lt; <span class="stringliteral">&quot;All files (*)&quot;</span>;
<a name="l00236"></a>00236 
<a name="l00237"></a>00237 <span class="preprocessor">    #if QT_VERSION &gt;= 0x040400</span>
<a name="l00238"></a>00238 <span class="preprocessor"></span>        dialog.setNameFilters(filters);
<a name="l00239"></a>00239 <span class="preprocessor">    #else</span>
<a name="l00240"></a>00240 <span class="preprocessor"></span>        dialog.setFilters(filters);
<a name="l00241"></a>00241 <span class="preprocessor">    #endif</span>
<a name="l00242"></a>00242 <span class="preprocessor"></span>
<a name="l00243"></a>00243     dialog.setWindowTitle(<span class="stringliteral">&quot;Open video file&quot;</span>);
<a name="l00244"></a>00244     dialog.setFileMode(QFileDialog::ExistingFile);
<a name="l00245"></a>00245     dialog.setViewMode(QFileDialog::Detail);
<a name="l00246"></a>00246 
<a name="l00247"></a>00247     QString str = getPropertyValue&lt;QString&gt;(<span class="stringliteral">&quot;URL&quot;</span>);
<a name="l00248"></a>00248     QStringList strl = str.split(<span class="stringliteral">&quot;/&quot;</span>);
<a name="l00249"></a>00249     strl.removeLast();
<a name="l00250"></a>00250     str = strl.join(<span class="stringliteral">&quot;/&quot;</span>);
<a name="l00251"></a>00251     QDir dir(str);
<a name="l00252"></a>00252 
<a name="l00253"></a>00253     <span class="keywordflow">if</span>(dir.exists())
<a name="l00254"></a>00254         dialog.setDirectory(str);
<a name="l00255"></a>00255     <span class="keywordflow">else</span>
<a name="l00256"></a>00256         dialog.setDirectory(QDir::currentPath());
<a name="l00257"></a>00257 
<a name="l00258"></a>00258     QString fileName;
<a name="l00259"></a>00259     <span class="keywordflow">if</span> (dialog.exec())
<a name="l00260"></a>00260         {
<a name="l00261"></a>00261         QString filename = dialog.selectedFiles().first();
<a name="l00262"></a>00262         setPropertyValue&lt;QString&gt;(<span class="stringliteral">&quot;URL&quot;</span>,filename);
<a name="l00263"></a>00263         form.url_line_edit-&gt;setText(filename);
<a name="l00264"></a>00264         writeOutputProperties();
<a name="l00265"></a>00265         emit file_selected();
<a name="l00266"></a>00266         }
<a name="l00267"></a>00267     }
<a name="l00268"></a>00268 
<a name="l00269"></a>00269 
</pre></div></div>
</td></tr></table>

<br /><hr><br />
<center><a href="http://perception.inf.um.es/QVision">QVision framework</a>.
<a href="http://perception.inf.um.es">PARP research group</a>.
Copyright &copy; 2007, 2008, 2009, 2010, 2011.</center>
<br />
</body>
</html>
